Alert archive / Iowa / Tornado Warnings in 2026
Tornado Warning 70, NWS Des Moines, IA
NWS Des Moines, IA issued this tornado warning at Jul 20, 2026, 3:57 PM CDT for 6 counties in Iowa. It was in force for 48 min. 4 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jul 20, 2026, 3:57 PM CDT (20:57 UTC)
- Expired
- Jul 20, 2026, 4:45 PM CDT
- In force
- 48 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
Counties Black Hawk County, IA, Butler County, IA, Franklin County, IA, Grundy County, IA, Hardin County, IA, Tama County, IA
The radar
The Des Moines radar (KDMX), 111 km from the middle of the area, began a volume at 21:01 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 20, 4:11 PM CDT | TSTM WND DMG | 2 Nnw Holland, IA | Received report via social media of tree damage around 199th and L Ave near Dike, IA. Time estimated from radar. |
| Jul 20, 4:12 PM CDT | TSTM WND DMG | Dike, IA | Medium size tree down. Time estimated via radar. |
| Jul 20, 4:27 PM CDT | TSTM WND GST 62 | 5 Sse Reinbeck, IA | PWS gust. |
| Jul 20, 4:39 PM CDT | TSTM WND GST 60 | 5 Ese Voorhies, IA | PWS gust. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this tornado warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 20, 3:03 PM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 9.0 hours before the alert went out and 288 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 982 J/kg
- Mixed-layer CIN
- -242 J/kg
- Mixed-layer LCL
- 1013 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 299 m²/s²
- 0-3 km storm-relative helicity
- 288 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.2
The text
As transmitted.
302
WFUS53 KDMX 202057
TORDMX
IAC013-023-069-075-083-171-202145-
/O.NEW.KDMX.TO.W.0070.260720T2057Z-260720T2145Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Des Moines IA
357 PM CDT Mon Jul 20 2026
The National Weather Service in Des Moines has issued a
* Tornado Warning for...
Northeastern Hardin County in central Iowa...
Southwestern Black Hawk County in northeastern Iowa...
Northern Tama County in central Iowa...
Southeastern Franklin County in north central Iowa...
Grundy County in central Iowa...
Southwestern Butler County in north central Iowa...
* Until 445 PM CDT.
* At 357 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Aplington, or 14 miles northwest of Grundy Center,
moving southeast at 50 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed.
Damage to roofs, windows, and vehicles will occur. Tree
damage is likely.
* This dangerous storm will be near...
Aplington around 400 PM CDT.
Grundy Center and Holland around 410 PM CDT.
Morrison around 415 PM CDT.
Reinbeck around 420 PM CDT.
Traer and Tf Clark State Park around 435 PM CDT.
Other locations impacted by this tornadic thunderstorm include Stout,
Morrison, Tf Clark State Park, Wellsburg, Lincoln, Holland, and
Ackley Municipal Airport.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4212 9254 4254 9307 4267 9290 4230 9229
TIME...MOT...LOC 2057Z 313DEG 44KT 4255 9291
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
Lee4 follow-up statements
533
WWUS53 KDMX 202110
SVSDMX
Severe Weather Statement
National Weather Service Des Moines IA
410 PM CDT Mon Jul 20 2026
IAC023-069-083-202120-
/O.CAN.KDMX.TO.W.0070.000000T0000Z-260720T2145Z/
Hardin IA-Franklin IA-Butler IA-
410 PM CDT Mon Jul 20 2026
...THE TORNADO WARNING FOR NORTHEASTERN HARDIN...SOUTHEASTERN
FRANKLIN AND SOUTHWESTERN BUTLER COUNTIES IS CANCELLED...
The tornadic thunderstorm which prompted the warning has moved out
of the warned area. Therefore, the warning has been cancelled.
However, a severe thunderstorm warning remains in effect.
A Tornado Watch remains in effect until 1000 PM CDT for central and
northeastern Iowa.
LAT...LON 4244 9295 4253 9277 4230 9229 4212 9254
TIME...MOT...LOC 2110Z 313DEG 44KT 4244 9275
$$
IAC013-075-171-202145-
/O.CON.KDMX.TO.W.0070.000000T0000Z-260720T2145Z/
Black Hawk IA-Tama IA-Grundy IA-
410 PM CDT Mon Jul 20 2026
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 445 PM CDT FOR
SOUTHWESTERN BLACK HAWK...NORTHERN TAMA AND CENTRAL GRUNDY
COUNTIES...
At 410 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Holland, or 5 miles north of Grundy Center, moving
southeast at 50 mph.
HAZARD...Tornado and quarter size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
Grundy Center, Traer, Reinbeck, Dike, Wellsburg, Holland, Lincoln,
Morrison, and Tf Clark State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.
&&
LAT...LON 4244 9295 4253 9277 4230 9229 4212 9254
TIME...MOT...LOC 2110Z 313DEG 44KT 4244 9275
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
$$
Lee452
WWUS53 KDMX 202123
SVSDMX
Severe Weather Statement
National Weather Service Des Moines IA
423 PM CDT Mon Jul 20 2026
IAC013-075-171-202145-
/O.CON.KDMX.TO.W.0070.000000T0000Z-260720T2145Z/
Black Hawk IA-Tama IA-Grundy IA-
423 PM CDT Mon Jul 20 2026
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 445 PM CDT FOR
SOUTHWESTERN BLACK HAWK...NORTHERN TAMA AND EAST CENTRAL GRUNDY
COUNTIES...
At 423 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Reinbeck, or 8 miles southeast of Grundy Center,
moving southeast at 50 mph.
HAZARD...Tornado and quarter size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
Traer, Reinbeck, Lincoln, Morrison, and Tf Clark State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.
&&
LAT...LON 4229 9276 4243 9257 4230 9229 4212 9254
TIME...MOT...LOC 2123Z 317DEG 44KT 4230 9262
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
$$
Lee826
WWUS53 KDMX 202133
SVSDMX
Severe Weather Statement
National Weather Service Des Moines IA
433 PM CDT Mon Jul 20 2026
IAC013-075-171-202145-
/O.CON.KDMX.TO.W.0070.000000T0000Z-260720T2145Z/
Black Hawk IA-Tama IA-Grundy IA-
433 PM CDT Mon Jul 20 2026
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 445 PM CDT FOR
SOUTHWESTERN BLACK HAWK...NORTHWESTERN TAMA AND SOUTHEASTERN GRUNDY
COUNTIES...
At 433 PM CDT, a severe thunderstorm capable of producing a tornado
was located 6 miles northwest of Traer, or 14 miles southeast of
Grundy Center, moving southeast at 35 mph.
HAZARD...Tornado and quarter size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
Traer.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.
&&
LAT...LON 4224 9270 4233 9253 4220 9243 4212 9254
TIME...MOT...LOC 2133Z 328DEG 31KT 4223 9257
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
$$
Lee774 WWUS53 KDMX 202141 SVSDMX Severe Weather Statement National Weather Service Des Moines IA 441 PM CDT Mon Jul 20 2026 IAC013-075-171-202150- /O.EXP.KDMX.TO.W.0070.000000T0000Z-260720T2145Z/ Black Hawk IA-Tama IA-Grundy IA- 441 PM CDT Mon Jul 20 2026 ...THE TORNADO WARNING FOR SOUTHWESTERN BLACK HAWK...NORTHWESTERN TAMA AND SOUTHEASTERN GRUNDY COUNTIES WILL EXPIRE AT 445 PM CDT... The storm which prompted the tornado warning has weakened and has exited the warned area. Therefore, the tornado warning will be allowed to expire at 445 PM. However, gusty winds are still possible with these thunderstorms and a severe thunderstorm warning remains in effect for the area. A Tornado Watch remains in effect until 1000 PM CDT for central and northeastern Iowa. To report severe weather, contact your nearest law enforcement agency. They will relay your report to the National Weather Service Des Moines. Remember, a Severe Thunderstorm Warning still remains in effect until 500 PM. LAT...LON 4224 9270 4233 9253 4220 9243 4212 9254 TIME...MOT...LOC 2140Z 313DEG 44KT 4218 9250 $$ Lee
What forecasters said that day
The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Des Moines, IA wrote its last area forecast discussion before this tornado warning went out at Jul 20, 2:34 PM CDT, 1 hour 23 minutes earlier. Its key messages:
- A Heat Advisory is in effect this afternoon with heat indices from 100-110F expected.
- Strong to severe storms are forecast from this afternoon through the overnight, beginning in northern Iowa and making it to southern Iowa by early Tuesday morning. All severe hazards are possible.
- Relief from the heat starts Tuesday and lasts through the work week before another warmup this weekend.
Area forecast discussion, Jul 20, 2:34 PM CDT, 1 hour 23 minutes before
Area Forecast Discussion National Weather Service Des Moines IA 234 PM CDT Mon Jul 20 2026 .KEY MESSAGES... - A Heat Advisory is in effect this afternoon with heat indices from 100-110F expected. - Strong to severe storms are forecast from this afternoon through the overnight, beginning in northern Iowa and making it to southern Iowa by early Tuesday morning. All severe hazards are possible. - Relief from the heat starts Tuesday and lasts through the work week before another warmup this weekend. && .SHORT TERM /THROUGH TUESDAY NIGHT/... Issued at 226 PM CDT Mon Jul 20 2026 A classic July NW flow severe weather setup is in store for todays enhanced risk across Iowa. A stacked 500mb trough and surface low is currently approaching Lake Superior and the trailing cold front through Minnesota to South Dakota will be our main storm initiation mechanism today. To the dismay of most of the recent CAMs, a few storms are already forming along the cold front in southern Minnesota, though these are elevated and the main show is likely to hold off until the boundary layer continues to destabilize. Speaking of destabilizing, the heat today is well underway as the grand finale of the past week of heat. Between the expected highs in the mid 90s and dewpoints in the mid 70s, heat indices across a large part of the state are expected to be between 100-110F. Many stations across central Iowa already have an index over 100F, but mixing out of moisture may keep them from surging too much higher. This will lead to a large zone of 3500+ J/kg of CAPE across north central Iowa as the cold front crosses the state. Hodographs are generally supportive of supercells, particularly further east near the warm front, with decent mid level shear and low level turning. Around mid to late afternoon, early convection along the cold front will have the best chance at briefly supercell mode, capable of large hail and gusty winds. 3CAPE, 0-1 SRH, and vorticity will all be most favorable for a tornado or two near the warm front (likely in or near ARX's CWA), though a powerful updraft sitting on the cold front could be capable of producing a tornado. The relatively large T/Td spreads and strong DCAPE could transition the threat quickly to a more linear mode, and damaging wind would then be the main threat. There is still large uncertainty in storm coverage across the cold front this afternoon. There is a scenario where initiation holds off until mid evening, and another where elevated convection in MN continues to intensify and establishes itself early as it crosses into Iowa. Storms into this evening and overnight will be dependent on how cold pools are established this afternoon. Convection will likely continue to develop this evening as the increasing LLJ overruns any remnant cold pools and the cold front meanders over central Iowa. A mainly damaging wind threat and perhaps large hail threat will be associated with these storms through the evening and overnight. Additionally, PWATs near 2" and some potential for training thunderstorms would make for a higher flash flooding threat, though this threat will be muted by the low soil moisture and mature crops. Any remaining storms will likely clear out of southern Iowa by early morning and give way to dry conditions on Tuesday. Relief from the heat will finally arrive Tuesday with highs in the low to mid 80s. Winds will stay quite breezy behind the cold front with gusts up to 30-35 mph in the afternoon. Additionally, the HRRR smoke guidance is forecasting smoke to linger through the day tomorrow, even at the surface, though it likely will be a bit improved from this morning. && .LONG TERM /WEDNESDAY THROUGH SUNDAY/... Issued at 226 PM CDT Mon Jul 20 2026 More mild conditions are expected through the end of the work week with highs in the upper 70s and 80s across the state. Continued ridging out to our south and west will continue, but there is decent signal for more shortwaves Wednesday into Thursday that could bring in additional chances for showers and storms. Severe weather is less likely with these storm chances, as moisture will be limited, but more details will be sorted out in the coming days. The ridge is again expected to intensify over the central plains during the weekend and heat will likely return by Saturday and Sunday. Continued NW flow could bring in a marginal chances for smoke haze since wildfires are still ongoing in Canada. && .AVIATION /18Z TAFS THROUGH 18Z TUESDAY/... Issued at 1234 PM CDT Mon Jul 20 2026 VFR TAFs are occurring across all TAF sites with the 18Z issuance. This morning's showers have moved off to the east but lingering low clouds still exist across the eastern terminals. There's forecast to be a lull in activity before a cold front drops southeast through Iowa later this afternoon through the overnight. Beginning at KMCW roughly 20Z and working south through the TAF period. The fast moving front will bring categorical reductions to TAF sites for a couple hours before moving out. Expect gusty and erratic winds and category reduction due to showers and storms. The front is forecast to be through KOTM by 10Z. Behind the departing front, wildfire smoke is progged to move back into the area bringing potential for VSBY reductions through the rest of the TAF window. Also, strong northwesterly winds are expected to develop late Tuesday morning. && .DMX WATCHES/WARNINGS/ADVISORIES... Heat Advisory until 8 PM CDT this evening for IAZ004>007- 015>017-023>028-033>039-044>050-057>062-070>075-081>086- 092>097. && SHORT TERM...De Bruin LONG TERM...De Bruin AVIATION...Vorst
Hazardous weather outlook, Jul 20, 2:38 PM CDT, 1 hour 19 minutes before
Hazardous Weather Outlook National Weather Service Des Moines IA 238 PM CDT Mon Jul 20 2026 IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075- 081>086-092>097-211945- Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo- Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-Sac-Calhoun- Webster-Hamilton-Hardin-Grundy-Black Hawk-Crawford-Carroll-Greene- Boone-Story-Marshall-Tama-Audubon-Guthrie-Dallas-Polk-Jasper- Poweshiek-Cass-Adair-Madison-Warren-Marion-Mahaska-Adams-Union- Clarke-Lucas-Monroe-Wapello-Taylor-Ringgold-Decatur-Wayne- Appanoose-Davis- 238 PM CDT Mon Jul 20 2026 This Hazardous Weather Outlook is for portions of central Iowa. .DAY ONE...This afternoon and tonight A Heat Advisory is in effect for the area today. Please refer to the National Weather Service website at weather.gov/desmoines for further details. Strong to severe thunderstorms are possible this afternoon into tonight with an Enhanced Risk (level 3 of 5) for severe storms. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday Additional thunderstorms are possible Wednesday night into Thursday. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed today. 67
In the hours before
Local storm report, Jul 20, 3:25 PM CDT, 32 minutes before
Preliminary Local Storm Report
National Weather Service Des Moines IA
325 PM CDT Mon Jul 20 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0252 PM Tstm Wnd Dmg 7 SSE Rock Falls 43.12N 93.03W
07/20/2026 Cerro Gordo IA Law Enforcement
Report of a semi tractor trailer and pickup
trick with attached trailer flipped on US-18
along Cerro Gordo/Floyd Co. lines. Time
estimated from radar.
&&
67Local storm report, Jul 20, 3:37 PM CDT, 20 minutes before
Preliminary Local Storm Report
National Weather Service Des Moines IA
337 PM CDT Mon Jul 20 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0335 PM Tstm Wnd Gst 6 WNW Belmond 42.88N 93.71W
07/20/2026 M62 MPH Wright IA Public
Measured by personal weather station.
&&
TDRLocal storm report, Jul 20, 3:39 PM CDT, 18 minutes before
Preliminary Local Storm Report
National Weather Service Des Moines IA
339 PM CDT Mon Jul 20 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0303 PM Tstm Wnd Dmg 3 SW Britt 43.07N 93.85W
07/20/2026 Hancock IA Emergency Mngr
Emergency manager shared photos of power
pole damage along 210th st. in Hancock
county. Time esatimted from radar.
&&
67Local storm report, Jul 20, 3:42 PM CDT, 15 minutes before
Preliminary Local Storm Report
National Weather Service Des Moines IA
342 PM CDT Mon Jul 20 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0340 PM Tstm Wnd Gst 4 S Sheffield 42.84N 93.23W
07/20/2026 M80 MPH Franklin IA Emergency Mngr
Relayed by emergency manager. Time estimated
from radar.
&&
67Local storm report, Jul 20, 3:53 PM CDT, 4 minutes before
Preliminary Local Storm Report
National Weather Service Des Moines IA
353 PM CDT Mon Jul 20 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0343 PM Tstm Wnd Gst 3 NNW Galt 42.73N 93.63W
07/20/2026 M65 MPH Wright IA Mesonet
Measured from personal weather station.
&&
67Local storm report, Jul 20, 3:54 PM CDT, 3 minutes before
Preliminary Local Storm Report
National Weather Service Des Moines IA
354 PM CDT Mon Jul 20 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0341 PM Tstm Wnd Gst Hampton 42.74N 93.20W
07/20/2026 M60 MPH Franklin IA Mesonet
Measured from personal weather station.
&&
67The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 7:35 AM CDT | Severe Thunderstorm Warning | DMX | Worth | 25 min |
| Jul 20, 2:46 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo, Hancock, Humboldt, Kossuth, Wright | 44 min |
| Jul 20, 2:51 PM CDT | Severe Thunderstorm Warning | DMX | Butler, Cerro Gordo, Franklin | 39 min |
| Jul 20, 3:23 PM CDT | Severe Thunderstorm Warning | DMX | Butler, Cerro Gordo, Franklin, Grundy, Hamilton, Hancock and 2 more | 67 min |
| Jul 20, 3:24 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk, Bremer, Butler, Franklin, Grundy | 66 min |
| Jul 20, 3:56 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk, Grundy, Hardin, Marshall, Tama | 64 min |
| Jul 20, 4:13 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk, Bremer | 37 min |
| Jul 20, 4:25 PM CDT | Severe Thunderstorm Warning | DMX | Hamilton, Hardin | 50 min |
| Jul 20, 4:34 PM CDT | Tornado Warning | DMX | Hamilton, Hardin | 41 min |
| Jul 20, 4:45 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Marshall, Poweshiek, Tama | 60 min |
| Jul 20, 5:00 PM CDT | Severe Thunderstorm Warning | DMX | Hamilton, Hardin, Story | 45 min |
| Jul 20, 5:04 PM CDT | Tornado Warning | DMX | Hamilton, Hardin, Story | 41 min |
| Jul 20, 5:28 PM CDT | Severe Thunderstorm Warning | DMX | Marshall, Story | 47 min |
| Jul 20, 5:44 PM CDT | Severe Thunderstorm Warning | DMX | Grundy, Hardin | 31 min |
| Jul 20, 5:48 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Marshall, Poweshiek, Tama | 57 min |
| Jul 20, 5:52 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Hamilton, Hardin, Story | 23 min |
| Jul 20, 6:09 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Hamilton, Hardin, Marshall, Story | 51 min |
| Jul 20, 6:12 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Marshall, Story | 48 min |
| Jul 20, 6:21 PM CDT | Severe Thunderstorm Warning | DMX | Boone | 54 min |
| Jul 20, 6:34 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Story | 26 min |
| Jul 20, 6:47 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Jasper, Polk, Story | 43 min |
Nearby
Tornado Warnings in Iowa, 2026Every tornado warning in 2026Tornadoes in 2026
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.